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Identification of Polymer of Counterfeit Documents

Jasna Galeković orcid.org/0009-0000-2152-3335 ; Ministry of the Interior, Forensic Science Center “Ivan Vučetić” *
Veronika, Marinović orcid.org/0009-0003-0592-4173 ; Ministry of the Interior, Forensic Science Center “Ivan Vučetić”
Andrea Ledić orcid.org/0000-0003-1396-8240 ; Ministry of the Interior, Forensic Science Center “Ivan Vučetić”

* Dopisni autor.

Sažetak

Modern identity and travel documents, such as identity cards, driver’s licenses, residence permits and passports
are made entirely or partially of polycarbonate. Polycarbonate documents are well secured since polycarbonate
enables the incorporation of various fraud-resistant security features. Due to a wide range of temperature resistance,
it is possible to individualize polycarbonate documents by laser engraving.
Various printing techniques, such as thermal printing, laser, and inkjet printing, have been used for
individualization of counterfeit travel and identity documents made of polymer. However, counterfeit
documents made of polymers that have similar general characteristics such as polycarbonate have
recently been detected where laser engraving of the photograph and data of the holder has been used.
The subject of this paper was to identify polymers used for production of counterfeit documents individualized
by laser engraving.
IR- spectroscopy was used for analysis of the qualitative chemical composition of the polymer of counterfeit
documents. The obtained IR-spectra were compared with the IR-spectra of the document specimen, as well as
with the IR-spectra available in the European Network Forensic Science Institute database, while the search was
performed using “KnowItAll” software.

Ključne riječi

counterfeit documents, laser engraving, polymers, polycarbonate, IR spectroscopy

Hrčak ID:

309372

URI

https://hrcak.srce.hr/309372

Datum izdavanja:

31.10.2023.

Posjeta: 642 *